Bathtub



FIG. 1 is a top plan view of a bathtub showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side being a mirror image of the side shown;

FIG. 3 is a left end view of FIG. 1;

FIG. 4 is a right end view of FIG. 1;

FIG. 5 is a bottom view thereof;

FIG. 6 is an enlarged fragmentary perspective view of one corner thereof; and

FIG. 7 is a top perspective thereof. 

The ornamental design for a bathtub, as shown and described. 